setbuf() -- STDIO Function (libc)

Set alternative stream buffer
#include <stdio.h>
void setbuf(fp, buffer)
FILE *fp; char *buffer;

The  standard I/O  library STDIO  automatically buffers  all data  read and
written  in streams,  with the  exception of  streams to  terminal devices.
STDIO normally uses malloc() to allocate  the buffer, which is a char array
BUFSIZ characters long; BUFSIZ is a manifest constant defined in the header
file stdio.h.

setbuf()'s arguments are the file stream fp and the buffer to be associated
with  the stream.   The call  should be  issued after  the stream  has been
opened, but before any input or  output request has been issued.  If buffer
is NULL, the  stream will be unbuffered.  If buffer  is not NULL, the arena
of memory it points to must contain at least BUFSIZ bytes.

setbuf() returns nothing.

See Also

fopen(),
libc,
malloc(),
setvbuf()
ANSI Standard, §7.9.5.5
POSIX Standard, §8.1

© 2012 by Stephen A. Ness